TIOBE Programming Community Index
The TIOBE Programming Community index gives an indication of the popularity of programming languages. The index is updated once a month. The ratings are based on the number of skilled engineers world-wide, courses and third party vendors. The popular search engines Google, MSN, Yahoo!, and YouTube are used to calculate the ratings. Observe that the TIOBE index is not about the best programming language or the language in which most lines of code have been written.
If TIOBE is to be belived, then (as of May 2008), plain-jain C is the second-most popular language around, and Objective-C has an insignificant 0.083% share; less then Lisp, Haskell, and Smalltalk (the irony).